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Showing 1 to 20 of 548 for “"incompressible"”.
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Incompressible Groups
… A group G, with order n, is said to be incompressible if it is not isomorphic to a subgroup of Sm where m < n, and if a group G is not incompressible then it is said to be compressible. For example, we will see that Z₄ is not isomorphic to any subgroup of Sn where n<4, hence, Z₄ is …
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Coherent structures in incompressible fluid flows
The work is broadly related to the transition to turbulence in pipe at intermediate Reynolds numbers and includes a discussion of two classes of structures observed during the transition to turbulence: numerically-extracted solutions of the Navier-Stokes equations (the "exact'') and …
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Incompressible flow over a three-dimensional cavity
… fluid dynamics (CFD) method, the physics of incompressible flow passing over a three-dimensional cavity on a solid surface. This study has been divided into two parts: 1) incompressible laminar flow passing over a three-dimensional cavity; and 2) incompressible laminar-to-turbulent transition …
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Viscous-inviscid interaction for incompressible flows over airfoils
… an investigation concerning viscous effects in incompressible flows over airfoils. These effects are taken into account by assuming the existence of a boundary layer which interacts with an external inviscid flow. Numerical methods for solving the inviscid and boundary-layer flows are briefly …
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Meshless Direct Numerical Simulation of Turbulent Incompressible Flows
… and Large Eddy Simulations (LES) of turbulent incompressible flows in regular and irregular geometries. The proposed method is a combination of several efficient techniques found in different Computational Fluid Dynamic (CFD) procedures and it is a major improvement of the algorithm published …
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Numerical Prediction of Three-Dimensional Incompressible Recirculating Flows
… and numerical predictions for three-dimensional incompressible recirculating flows, in particular, laminar flow in a ninety-degree bifurcation and turbulent flow over a backward-facing step, using finite-differences and the Navier-Stokes equations in primitive variables.
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Incompressible Flow Past Wedges at High Reynolds Numbers
Made available in DSpace on 2014-12-13T19:55:26Z (GMT). No. of bitstreams: 1 7726775.pdf: 3370976 bytes, checksum: 9309341f2aec6da3c58b32911182af2d (MD5) Previous issue date: 1977
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Numerical simulation and control of separated incompressible flows
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1996.
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Incompressible journal bearings with combined hydrostatic-hydrodynamic action.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1965. Ph.D.
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Adaptive finite element simulation of incompressible viscous flow
… employed for solving two- and three-dimensional incompressible flows. The formulation is based on a segregated solution method. In this segregated formulation, the velocities and pressures are uncoupled and the equations for each are solved one after the other. This segregated solution method is …
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Exponential Integrators for the Incompressible Navier-Stokes Equations
… projection scheme for time integration of the incompressible Navier-Stokes equations (NSE). The method is based on a projection onto the subspace of divergence-free (incompressible) functions interleaved with a Krylov-based exponential time integration (KBEI). These time integration methods …
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Optimal Linear Feedback Control for Incompressible Fluid Flow
Linear feedback control is considered for large systems of differential algebraic equations arising from discretization of saddle point problems. Necessary conditions are derived by applying the Maximum Principle and have the form of constrained Riccati equations. We consider two approaches for …
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Numerical modeling of incompressible flow applied to casting processes
Modern casting processes allow the precise production of parts with complex shapes. Especially mold filling is of importance, since many features of the cast part are determined in this stage of the process. Concerning the manufacturing of complex industrial parts with high quality even in small …
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On the finite element analysis of nonlinear incompressible solids
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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Sensitivity analysis and computational shape optimization for incompressible flows
We consider the optimization of a cost functional defined for a fluid flowing through a channeL Parameters control the shape of an obstruction in the flow, and the strength of the inflow. The problem is discretized using finite elements. Optimization algorithms are considered which use either …
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Two and three-dimensional incompressible and compressible viscous fluctuations
… classes of unsteady two- and three-dimensional incompressible and compressible . boundary-layer flows. The general character of the mathematical problem is investigated first for each particular area. Asymptotic solutions are then provided based on the assumption of small amplitude and small …
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A Finite-Element Coarse-GridProjection Method for Incompressible Flows
… CGP to pressure correction schemes used for the incompressible Navier Stokes flow computations. This version is validated on standard test cases with realistic boundary conditions using unstructured triangular meshes. We also pioneer investigations of the effects of CGP on the accuracy of the …
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High-order incompressible Navier-Stokes equations solver for blood flow
… difference solver was written to solve the incompressible Navier-Stokes (NS) equations and was applied to analyze the blood flow. First, a computer code was written to solve incompressible Navier- Stokes equations using the exact projection method/fractional step scheme. A fifth-order …
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Analysis of hybrid discontinuous Galerkin methods for incompressible flow problems
In this work, we consider the derivation and analysis of finite element methods for the approximate solution of the Navier-Stokes equations, which describe the motion of liquid and gaseous substances. We investigate the stability and approximation properties of primal hybrid discontinuous Galerkin …
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